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Finding the Fourth Proportional to 71,643.42, 98,861.04 and 39,810.42

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Solution

The fourth proportional to 71,643.42, 98,861.04 and 39,810.42 is: 54,934.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,643.42 : 98,861.04 = 39,810.42 : x
  2. Step 2: Convert to fraction form
    71,643.42/98,861.04 = 39,810.42/x
  3. Step 3: Cross multiply
    71,643.42x = 98,861.04 × 39,810.42
  4. Step 4: Simplify right side
    71,643.42x = 3,935,699,524.04
  5. Step 5: Solve for x
    x = 3,935,699,524.04/71,643.42
  6. Step 6: Final answer
    x = 54,934.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.